# NTSB investigations: Hughes OH-6A, 1999

NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports.

## Latest cases

- [NTSB MIA00GA057](https://openairdocs.org/ntsb/MIA00GA057.md): Hughes OH-6A · Fort Myers, FL · Accident · Serious injuries · Final report · Dec 20, 1999 · N72LC · Substantial damage
  > improper maintenance inspection of the helicopter by unknown maintenance personnel, resulting in a worn control rod bearing being continued in service, and subsequent separation, resulting in an in-flight loss of control and a crash.
- [NTSB MIA99TA206](https://openairdocs.org/ntsb/MIA99TA206.md): Hughes OH-6A · Aguadilla, PR · Accident · No injuries · Final report · Jul 29, 1999 · N66377 · Substantial damage
  > An unidentified foreign object passing through the oil cooler blower assembly resulting in fracture and seizure of the oil cooler blower, and slowing of the main transmission and main rotor, which resulted in the pilot being unable to arrest the descent…
- [NTSB LAX99GA216](https://openairdocs.org/ntsb/LAX99GA216.md): Hughes OH-6A · Tucson, AZ · Accident · Serious injuries · Final report · Jun 15, 1999 · N6187C · Destroyed
  > Fuel exhaustion resulting from pilot's failure to perform adequate fuel consumption calculations. The unreliable and inoperative fuel level indicating system components and the operator's operation of the aircraft with known deficiencies were factors in the…

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
SELECT c."ntsbNumber", c."eventDate", c."eventType", c."eventCity", c."eventStateOrRegion", a.n_number, a."aircraftMake", a."aircraftModel", c."highestInjuryLevel", c."totalFatal", c."completionStatus", c.report_url
FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c."mKey" AND a.position = 1
WHERE year(c."eventDate") = 1999
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('4470905'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=4470905&year=1999

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